Mucus plug?

Im currently 36 weeks 2 days pregnant and last night I was admitted to the hospital for observation because I was contracting and was 4 cm dilating but cervix was still too high. This morning I was 5cm but cervix was still high so they decided to send me home. Nurse told me I could expect some spotting because they were checking my cervix , but this looks more like cervical mucus than just “spotting” what do y’all think should I go back or this looks normal ?( I don’t have any pain)